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XHZK1620 Low-Voltage Short-Circuit Impedance Tester is a specialized high-precision instrument designed for measuring the low-voltage short-circuit impedance of power transformers rated at 35kV and above. Short-circuit impedance testing is a critical diagnostic method for detecting winding deformation, displacement, and mechanical integrity issues — particularly after transformers have experienced through-fault currents, transportation, or seismic events. Suitable for both on-site substation deployment and laboratory conditions, the instrument delivers Class 0.2 voltage and current measurement accuracy with automatic computation of impedance parameters. Its large sunlight-readable LCD, intuitive Chinese menu navigation, and built-in thermal printer make it the reliable choice for transformer condition assessment across the power industry.
Technical Specifications
Parameter
Specification
Measurement
Voltage Range
5 V – 400 V
Current Range
0.5 A – 10 A
Voltage Accuracy
Class 0.2
Current Accuracy
Class 0.2
Power Accuracy (cosφ > 0.1)
Class 0.5
Power Accuracy (cosφ ≤ 0.1)
Class 1.0
Power & Environment
Operating Power Supply
AC 220V ± 10%, 50 Hz ± 1 Hz
Ambient Temperature
-10℃ to +50℃
Relative Humidity
≤ 85% RH
Applicable Transformer Rating
35 kV and above
Display & Output
Display
Large LCD, Chinese menu, sunlight-readable
Printer
Built-in thermal printer (standard)
Key Performance Features
Class 0.2 High-Precision Measurement — Industry-leading voltage and current accuracy at Class 0.2 ensures that even subtle variations in short-circuit impedance — which may indicate early-stage winding deformation — are reliably detected and quantified.
Wide-Range 5V–400V Measurement — Broad voltage measurement range accommodates diverse transformer sizes and configurations without external voltage dividers.
Low-Voltage Safe Testing Methodology — Applies low-voltage excitation to measure short-circuit impedance, eliminating the hazards and logistical complexity associated with high-voltage short-circuit testing.
Sunlight-Readable Large LCD — High-contrast display with full Chinese menu prompts ensures clear visibility even under direct outdoor sunlight for substation field testing.
Built-in Thermal Printer — Standard integrated printer generates immediate hard-copy test reports at the test site.
Rugged Field-Ready Design — Wide operating temperature range (-10℃ to +50℃) and humidity tolerance (≤85% RH) enable reliable deployment across diverse climates.
Application Areas
Sector
Typical Applications
Power Systems
Generation, transmission, transformation, and distribution transformer impedance testing
Industrial Plants & Mining
Large-scale manufacturing and mining transformer condition assessment
Metallurgy & Petrochemical
Smelting, chemical processing, and water treatment facility transformer diagnostics
Transportation Infrastructure
Ports, railways, highways, airports, and municipal street lighting systems
Commercial & Institutional
Large enterprise logistics and institutional facility power systems
Construction Industry
Large construction projects and property management transformer evaluation
Testing & Commissioning
Power installation and commissioning service providers at all levels
Product Image
Frequently Asked Questions
Q1: Is this tester suitable for transformer winding deformation diagnostics?
Yes, short-circuit impedance measurement is one of the primary methods recognized by IEC and IEEE standards for detecting transformer winding deformation. When a transformer experiences high through-fault currents, the electromagnetic forces can physically deform windings. By comparing the XHZK1620’s Class 0.2 accuracy impedance measurements against baseline factory values or previous test records, winding displacement or deformation can be identified before it progresses to insulation failure.
Q2: Can transformer short-circuit withstand assessment teams use this instrument?
Absolutely. When transformers are being evaluated for short-circuit withstand capability, the XHZK1620 provides the precision impedance data needed to calculate prospective fault currents and verify that the design impedance matches nameplate values. The Class 0.5 power accuracy (cosφ > 0.1) enables accurate determination of both resistive and reactive components of impedance.
Q3: How does it serve substation commissioning and handover testing?
Before a new or refurbished transformer is accepted into service, commissioning engineers must verify that short-circuit impedance falls within the specified tolerance. The XHZK1620’s Class 0.2 measurement accuracy provides the precision required for formal acceptance testing. Its sunlight-readable display and wide temperature range enable on-site substation testing without specialized crews.
Q4: Is it appropriate for post-fault transformer condition assessment?
After a transformer has experienced a through-fault, determining whether it can be safely returned to service is urgent. The XHZK1620 enables rapid on-site impedance measurement to compare against pre-fault baseline values. A significant change (> 2-3%) strongly suggests winding deformation requiring investigation, while stable values support timely return-to-service.
Q5: Can transformer relocation teams use this for pre/post-move verification?
Transporting large power transformers subjects them to mechanical shock and vibration that can cause winding displacement. The XHZK1620 is ideal for pre-transport and post-installation impedance verification: take a baseline before the transformer leaves its original location, then retest after positioning at the destination. Any significant deviation indicates transport-related winding movement requiring investigation before energization.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer
Year Established:
2013
Total Annual:
1000000-5000000
Employee Number:
50~100
Ecer Certification：
Verified Supplier
Xi'an Xu&Hui Electromechanical Technology Co., Ltd. /Xian XZH Electric Power Technology Co., Ltd.
Has found in 2013, located in Xi'an, China. which is a highly experienced team dedicated to developing electrical...
Xi'an Xu&Hui Electromechanical Technology Co., Ltd. /Xian XZH Electric Power Technology Co., Ltd.
Has found in 2013, located in Xi'an, China. which is a highly experienced team dedicated to developing electrical...
